Coupling effect of electric field and corona discharge on combustion and soot formation of ethylene jet flame

The coupling of electric field (E-field) and corona discharge is designed to adjust the appearance and soot formation of the ethylene jet flame. The temperature and content of soot are measured by the improved two-color pyrometry (TCP). Experiments indicate that the flame is stretched and deflected laterally under the coupling field. The maximum temperature of soot and the proportion of high temperature zone in the flame increase, and oxidation rate of soot increases. The flame is more stable under the coupling of reverse E-field and corona discharge. From the non-coupled field to the coupling field of 100 kV/m and-100 kV/m, the temperature proportion of the flame in the range of 1700 K-1800 K increases from 0 to 44.2 % and 54.8 % respectively, and the peak oxidation rates of soot also increase by 204 % and 219 % respectively. The E-field in the coupling field accounts for the main influence. The high voltage side of the flame is affected by the ionic wind generated by corona discharge, and the amount of soot generated under the high coupling field is less than that on the left side.